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 * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 */

package javax.swing.plaf.synth;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.plaf.*;
import javax.swing.plaf.basic.BasicDesktopIconUI;
import java.beans.*;


/**
 * Provides the Synth L&amp;F UI delegate for a minimized internal frame on a desktop.
 *
 * @author Joshua Outwater
 * @since 1.7
 */
public class SynthDesktopIconUI extends BasicDesktopIconUI
    implements SynthUI, PropertyChangeListener {

  private SynthStyle style;
  private Handler handler = new Handler();

  /**
   * Creates a new UI object for the given component.
   *
   * @param c component to create UI object for
   * @return the UI object
   */
  public static ComponentUI createUI(JComponent c) {
    return new SynthDesktopIconUI();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  protected void installComponents() {
    if (UIManager.getBoolean("InternalFrame.useTaskBar")) {
      iconPane = new JToggleButton(frame.getTitle(), frame.getFrameIcon()) {
        @Override
        public String getToolTipText() {
          return getText();
        }

        @Override
        public JPopupMenu getComponentPopupMenu() {
          return frame.getComponentPopupMenu();
        }
      };
      ToolTipManager.sharedInstance().registerComponent(iconPane);
      iconPane.setFont(desktopIcon.getFont());
      iconPane.setBackground(desktopIcon.getBackground());
      iconPane.setForeground(desktopIcon.getForeground());
    } else {
      iconPane = new SynthInternalFrameTitlePane(frame);
      iconPane.setName("InternalFrame.northPane");
    }
    desktopIcon.setLayout(new BorderLayout());
    desktopIcon.add(iconPane, BorderLayout.CENTER);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  protected void installListeners() {
    super.installListeners();
    desktopIcon.addPropertyChangeListener(this);

    if (iconPane instanceof JToggleButton) {
      frame.addPropertyChangeListener(this);
      ((JToggleButton) iconPane).addActionListener(handler);
    }
  }

  /**
   * {@inheritDoc}
   */
  @Override
  protected void uninstallListeners() {
    if (iconPane instanceof JToggleButton) {
      ((JToggleButton) iconPane).removeActionListener(handler);
      frame.removePropertyChangeListener(this);
    }
    desktopIcon.removePropertyChangeListener(this);
    super.uninstallListeners();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  protected void installDefaults() {
    updateStyle(desktopIcon);
  }

  private void updateStyle(JComponent c) {
    SynthContext context = getContext(c, ENABLED);
    style = SynthLookAndFeel.updateStyle(context, this);
    context.dispose();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  protected void uninstallDefaults() {
    SynthContext context = getContext(desktopIcon, ENABLED);
    style.uninstallDefaults(context);
    context.dispose();
    style = null;
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public SynthContext getContext(JComponent c) {
    return getContext(c, getComponentState(c));
  }

  private SynthContext getContext(JComponent c, int state) {
    return SynthContext.getContext(c, style, state);
  }

  private int getComponentState(JComponent c) {
    return SynthLookAndFeel.getComponentState(c);
  }

  /**
   * Notifies this UI delegate to repaint the specified component.
   * This method paints the component background, then calls
   * the {@link #paint(SynthContext, Graphics)} method.
   *
   * <p>In general, this method does not need to be overridden by subclasses.
   * All Look and Feel rendering code should reside in the {@code paint} method.
   *
   * @param g the {@code Graphics} object used for painting
   * @param c the component being painted
   * @see #paint(SynthContext, Graphics)
   */
  @Override
  public void update(Graphics g, JComponent c) {
    SynthContext context = getContext(c);

    SynthLookAndFeel.update(context, g);
    context.getPainter().paintDesktopIconBackground(context, g, 0, 0,
        c.getWidth(), c.getHeight());
    paint(context, g);
    context.dispose();
  }

  /**
   * Paints the specified component according to the Look and Feel.
   * <p>This method is not used by Synth Look and Feel.
   * Painting is handled by the {@link #paint(SynthContext, Graphics)} method.
   *
   * @param g the {@code Graphics} object used for painting
   * @param c the component being painted
   * @see #paint(SynthContext, Graphics)
   */
  @Override
  public void paint(Graphics g, JComponent c) {
    SynthContext context = getContext(c);

    paint(context, g);
    context.dispose();
  }

  /**
   * Paints the specified component. This implementation does nothing.
   *
   * @param context context for the component being painted
   * @param g the {@code Graphics} object used for painting
   * @see #update(Graphics, JComponent)
   */
  protected void paint(SynthContext context, Graphics g) {
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void paintBorder(SynthContext context, Graphics g, int x,
      int y, int w, int h) {
    context.getPainter().paintDesktopIconBorder(context, g, x, y, w, h);
  }

  public void propertyChange(PropertyChangeEvent evt) {
    if (evt.getSource() instanceof JInternalFrame.JDesktopIcon) {
      if (SynthLookAndFeel.shouldUpdateStyle(evt)) {
        updateStyle((JInternalFrame.JDesktopIcon) evt.getSource());
      }
    } else if (evt.getSource() instanceof JInternalFrame) {
      JInternalFrame frame = (JInternalFrame) evt.getSource();
      if (iconPane instanceof JToggleButton) {
        JToggleButton button = (JToggleButton) iconPane;
        String prop = evt.getPropertyName();
        if (prop == "title") {
          button.setText((String) evt.getNewValue());
        } else if (prop == "frameIcon") {
          button.setIcon((Icon) evt.getNewValue());
        } else if (prop == JInternalFrame.IS_ICON_PROPERTY ||
            prop == JInternalFrame.IS_SELECTED_PROPERTY) {
          button.setSelected(!frame.isIcon() && frame.isSelected());
        }
      }
    }
  }

  private final class Handler implements ActionListener {

    public void actionPerformed(ActionEvent evt) {
      if (evt.getSource() instanceof JToggleButton) {
        // Either iconify the frame or deiconify and activate it.
        JToggleButton button = (JToggleButton) evt.getSource();
        try {
          boolean selected = button.isSelected();
          if (!selected && !frame.isIconifiable()) {
            button.setSelected(true);
          } else {
            frame.setIcon(!selected);
            if (selected) {
              frame.setSelected(true);
            }
          }
        } catch (PropertyVetoException e2) {
        }
      }
    }
  }
}
